I'm 20 years old this year, male, living in Singapore. Recently, i felt something weird with the left side of my chest... at times, i felt a very sharp pain at the left side of the chest (Sorry, i dont know how to describe, it's somewhere near where the nipple is located, but it's inside the chest...)The sharp pain goes off just after a few seconds, and usually it doesn't last more than 3 secs. And at times, i felt a little discomfort at the left side of the chest... its not very very painful, but i just now it's discomfort... it's something like there's a little pressure on the chest...

I never have shortness of breath, or i never feel tightness on chest. Can anyone help me with that? Could this be a problem with my heart?

According to American Heart Association 18-20 year olds have the lowest heart attack probability. That doesn't mean it doesn't happen. Most of the time this age group get heart attacks due to pre-existing conditions.

I think having your physician check you out is wise but try not to overthink the weird feeling and by tomorrow at this time you will have some answers.